Bangers and mash is a classic British dish that consists of sausages (bangers) served with mashed potatoes (mash) and onion gravy. The sausages are typically made from pork or beef and are often flavored with herbs and spices. The mashed potatoes are creamy and buttery, and the onion gravy adds a rich and savory flavor. Bangers and mash is a comforting and filling dish that is popular in British food restaurants, especially in pubs.